1 ;;; tests/parser.el --- Some tests for js2-mode.
3 ;; Copyright (C) 2009, 2011-2013 Free Software Foundation, Inc.
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software: you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation, either version 3 of the License, or
10 ;; (at your option) any later version.
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
27 (defmacro js2-deftest (name buffer-contents &rest body)
28 (declare (indent defun))
29 `(ert-deftest ,(intern (format "js2-%s" name)) ()
32 (insert ,buffer-contents))
36 (fundamental-mode)))))
38 (defun js2-test-string-to-ast (s)
41 (should (null js2-mode-buffer-dirty-p))
44 (cl-defun js2-test-parse-string (code-string &key syntax-error errors-count
46 (ert-with-test-buffer (:name 'origin)
47 (let ((ast (js2-test-string-to-ast code-string)))
49 (let ((errors (js2-ast-root-errors ast)))
50 (should (= (or errors-count 1) (length errors)))
51 (cl-destructuring-bind (_ pos len) (car (last errors))
52 (should (string= syntax-error (substring code-string
53 (1- pos) (+ pos len -1))))))
54 (should (= 0 (length (js2-ast-root-errors ast))))
55 (ert-with-test-buffer (:name 'copy)
57 (skip-chars-backward " \t\n")
58 (should (string= (or reference code-string)
59 (buffer-substring-no-properties
60 (point-min) (point)))))))))
62 (cl-defmacro js2-deftest-parse (name code-string &key bind syntax-error errors-count
64 "Parse CODE-STRING. If SYNTAX-ERROR is nil, print syntax tree
65 with `js2-print-tree' and assert the result to be equal to
66 REFERENCE, if present, or the original string. If SYNTAX-ERROR
67 is passed, expect syntax error highlighting substring equal to
68 SYNTAX-ERROR value. BIND defines bindings to apply them around
70 (declare (indent defun))
71 `(ert-deftest ,(intern (format "js2-%s" name)) ()
72 (let ,(append bind '((js2-basic-offset 2)))
73 (js2-test-parse-string ,code-string
74 :syntax-error ,syntax-error
75 :errors-count ,errors-count
76 :reference ,reference))))
80 (js2-deftest-parse variable-assignment
83 (js2-deftest-parse empty-object-literal
86 (js2-deftest-parse empty-array-literal
89 (js2-deftest-parse array-with-missing-elements
92 (js2-deftest-parse comma-after-regexp
95 (js2-deftest-parse return-statement
96 "function foo() {\n return 2;\n}")
98 (js2-deftest-parse function-statement
99 "function foo() {\n}")
101 (js2-deftest-parse function-statement-inside-block
102 "if (true) {\n function foo() {\n }\n}")
104 (js2-deftest-parse function-expression-statements-are-verboten
105 "function() {}" :syntax-error "(")
107 (js2-deftest-parse member-expr-as-function-name
108 "function a.b.c[2](x, y) {\n}"
109 :bind ((js2-allow-member-expr-as-function-name t)))
111 (js2-deftest-parse named-function-expression
112 "a = function b() {};")
114 (js2-deftest-parse parenthesized-expression
117 (js2-deftest-parse for-with-in-operator-in-parens
118 "for (var y = (0 in []) in {}) {\n}")
120 (js2-deftest-parse for-with-in-operator-in-cond
121 "for (var y = 1 ? 0 in [] : false in {}) {\n}")
123 (js2-deftest-parse let-expression
126 (js2-deftest-parse let-expression-statement
129 (js2-deftest-parse void
132 ;;; Callers of `js2-valid-prop-name-token'
134 (js2-deftest-parse parse-property-access-when-not-keyword
137 (js2-deftest-parse parse-property-access-when-keyword
139 :bind ((js2-allow-keywords-as-property-names t)))
141 (js2-deftest-parse parse-property-access-when-keyword-no-xml
143 :bind ((js2-allow-keywords-as-property-names t)
144 (js2-compiler-xml-available nil)))
146 (js2-deftest-parse parse-object-literal-when-not-keyword
149 (js2-deftest-parse parse-object-literal-when-keyword
151 :bind ((js2-allow-keywords-as-property-names t)))
153 ;;; 'of' contextual keyword
155 (js2-deftest-parse parse-legacy-array-comp-loop-with-of
156 "[a for (a of [])];")
158 (js2-deftest-parse parse-array-comp-loop
159 "[for (a of []) a];")
161 (js2-deftest-parse parse-for-of
162 "for (var a of []) {\n}")
164 (js2-deftest-parse of-can-be-var-name
167 (js2-deftest-parse of-can-be-function-name
168 "function of() {\n}")
170 ;;; Destructuring binding
172 (js2-deftest-parse destruct-in-declaration
173 "var {a, b} = {a: 1, b: 2};")
175 (js2-deftest-parse destruct-in-arguments
176 "function f({a: aa, b: bb}) {\n}")
178 (js2-deftest-parse destruct-in-array-comp-loop
179 "[a + b for ([a, b] in [[0, 1], [1, 2]])];")
181 (js2-deftest-parse destruct-in-catch-clause
182 "try {\n} catch ({a, b}) {\n a + b;\n}")
184 (js2-deftest-parse destruct-with-initializer-in-object
185 "var {a, b = 2, c} = {};")
187 (js2-deftest-parse destruct-with-initializer-in-array
188 "var [a, b = 2, c] = [];")
190 (js2-deftest-parse destruct-non-name-target-is-error
191 "var {1=1} = {};" :syntax-error "1" :errors-count 1)
193 (js2-deftest-parse destruct-with-initializer-in-function-params
194 "function f({a, b = 1, c}, [d, e = 1, f]) {\n}")
196 (js2-deftest-parse destruct-with-default-in-function-params
197 "function f({x = 1, y = 2} = {}, [x, y] = [1, 2]) {\n}")
199 (js2-deftest-parse destruct-name-conflict-is-error-in-object
200 "\"use strict\";\nvar {a=1,a=2} = {};" :syntax-error "a" :errors-count 1)
202 (js2-deftest destruct-name-conflict-is-warning-in-array "\"use strict\";\nvar [a=1,a=2] = [];"
204 (should (equal '("msg.var.redecl" "a")
205 (caar js2-parsed-warnings))))
207 (js2-deftest initializer-outside-destruct-is-error "({a=1});"
209 (should (equal "msg.init.no.destruct"
210 (car (caar js2-parsed-errors)))))
214 (js2-deftest-parse object-literal-shorthand
215 "var x = {a: 1, b, c: 1, d};")
217 (js2-deftest-parse object-literal-shorthard-with-number
218 "var a = {1};" :syntax-error "}" :errors-count 2)
220 (js2-deftest-parse object-literal-method
221 "var x = {f(y) { return y;\n}};")
223 (js2-deftest object-literal-method-own-name-in-scope "({f(){f();}});"
225 (should (equal '("msg.undeclared.variable" "f")
226 (caar js2-parsed-warnings))))
228 (js2-deftest-parse object-literal-getter-method
229 "var x = {get f() { return 42;\n}};")
231 (js2-deftest-parse object-literal-setter-method
232 "var x = {set f(y) { x = y;\n}};")
234 (js2-deftest-parse object-literal-computed-keys
235 "var x = {[Symbol.iterator]: function() {}};")
237 (js2-deftest-parse object-literal-computed-function-keys
238 "var x = {[foo + bar](y) { return y;\n}};")
240 (js2-deftest-parse object-literal-computed-getter-key
241 "var x = {get [foo + bar]() { return 42;\n}};")
243 (js2-deftest-parse object-literal-generator
244 "var x = {*foo() { yield 42;\n}};")
246 (js2-deftest-parse object-literal-computed-generator-key
247 "var x = {*[foo + bar]() { yield 42;\n}};")
249 ;;; Function definition
251 (js2-deftest function-redeclaring-var "var gen = 3; function gen() {};"
253 (should (= (length (js2-ast-root-warnings js2-mode-ast)) 1)))
255 (js2-deftest function-expression-var-same-name "var gen = function gen() {};"
257 (should (null (js2-ast-root-warnings js2-mode-ast))))
259 ;;; Function parameters
261 (js2-deftest-parse function-with-default-parameters
262 "function foo(a = 1, b = a + 1) {\n}")
264 (js2-deftest-parse function-with-no-default-after-default
265 "function foo(a = 1, b) {\n}")
267 (js2-deftest-parse function-with-destruct-after-default
268 "function foo(a = 1, {b, c}) {\n}")
270 (js2-deftest-parse function-with-rest-parameter
271 "function foo(a, b, ...rest) {\n}")
273 (js2-deftest-parse function-with-param-after-rest-parameter
274 "function foo(a, ...b, rest) {\n}"
275 :syntax-error "rest")
277 (js2-deftest-parse function-with-destruct-after-rest-parameter
278 "function foo(a, ...b, {}) {\n}"
281 (js2-deftest-parse function-with-rest-after-default-parameter
282 "function foo(a = 1, ...rest) {\n}")
284 ;;; Strict mode errors
286 (js2-deftest-parse function-bad-strict-parameters
287 "'use strict';\nfunction foo(eval, {arguments}, bar) {\n}"
288 :syntax-error "eval" :errors-count 2)
290 (js2-deftest-parse function-retroactive-bad-strict-parameters
291 "function foo(arguments) {'use strict';}"
292 :syntax-error "arguments" :errors-count 1)
294 (js2-deftest-parse function-duplicate-strict-parameters
295 "'use strict';\nfunction foo(a, a) {\n}"
296 :syntax-error "a" :errors-count 1)
298 (js2-deftest-parse function-bad-strict-function-name
299 "'use strict';\nfunction eval() {\n}"
300 :syntax-error "eval" :errors-count 1)
302 (js2-deftest-parse function-bad-retroactive-strict-function-name
303 "function arguments() {'use strict';}"
304 :syntax-error "arguments" :errors-count 1)
306 (js2-deftest-parse function-bad-strict-catch-name
307 "'use strict';\ntry {} catch (eval) {}"
308 :syntax-error "eval" :errors-count 1)
310 (js2-deftest-parse function-bad-strict-variable-name
311 "'use strict';\nvar eval = 'kekeke';"
312 :syntax-error "eval" :errors-count 1)
314 (js2-deftest-parse function-bad-strict-assignment
315 "'use strict';\narguments = 'fufufu';"
316 :syntax-error "arguments" :errors-count 1)
318 (js2-deftest-parse function-property-strict-assignment
319 "'use strict';\narguments.okay = 'alright';")
321 (js2-deftest-parse function-strict-with
322 "'use strict';\nwith ({}) {}"
323 :syntax-error "with" :errors-count 1)
325 (js2-deftest-parse function-strict-octal
326 "'use strict';\nvar number = 0644;"
327 :syntax-error "0644" :errors-count 1)
329 (js2-deftest-parse function-strict-octal-allow-0o
330 "'use strict';\n0o644;" :reference "'use strict';\n420;")
332 (js2-deftest-parse function-strict-duplicate-keys
333 "'use strict';\nvar object = {a: 1, a: 2, 'a': 3, ['a']: 4, 1: 5, '1': 6, [1 + 1]: 7};"
334 :syntax-error "a" :errors-count 4) ; "a" has 3 dupes, "1" has 1 dupe.
336 (js2-deftest-parse function-strict-duplicate-getter
337 "'use strict';\nvar a = {get x() {}, get x() {}};"
338 :syntax-error "x" :errors-count 1)
340 (js2-deftest-parse function-strict-duplicate-setter
341 "'use strict';\nvar a = {set x() {}, set x() {}};"
342 :syntax-error "x" :errors-count 1)
344 ;;; Lack of errors in strict mode
346 (js2-deftest-parse function-strict-const-scope
347 "'use strict';\nconst a;\nif (1) {\n const a;\n}")
349 (js2-deftest-parse function-strict-no-getter-setter-duplicate
350 "'use strict';\nvar a = {get x() {}, set x() {}};")
354 (js2-deftest-parse spread-in-array-literal
355 "[1, ...[2, 3], 4, ...[5, 6]];")
357 (js2-deftest-parse spread-in-function-call
358 "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
362 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
363 "() => false;" :reference "() => {false};")
365 (js2-deftest-parse arrow-function-with-args-and-curlies
366 "(a, b = 1, ...c) => { c;\n};")
368 (js2-deftest-parse arrow-function-with-destructuring
369 "([{a}, b]) => { a + b;\n};")
371 (js2-deftest-parse parenless-arrow-function-prohibits-rest
372 "...b => {b + 1;};" :syntax-error "=>")
374 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
375 "[a, b] => {a + b;};" :syntax-error "]" :errors-count 4)
377 (js2-deftest-parse arrow-function-recovers-from-error
378 "[(,foo) => 1];" :syntax-error "," :errors-count 6)
380 ;;; Automatic semicolon insertion
382 (js2-deftest-parse no-auto-semi-insertion-after-if
385 (js2-deftest-parse auto-semi-insertion-after-function
386 "a = function() {}" :reference "a = function() {};")
388 (js2-deftest-parse auto-semi-one-variable-per-line
389 "x\ny" :reference "x;\ny;")
393 (js2-deftest-parse labeled-stmt-node
394 "foo:\nbar:\nx = y + 1;")
396 (js2-deftest no-label-node-inside-expr "x = y:"
397 (let (js2-parse-interruptable-p)
399 (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
400 (should (js2-name-node-p (js2-assign-node-right assignment)))))
402 (js2-deftest-parse label-and-loops "for (; ; ) {
411 (js2-deftest-parse legacy-generator "function foo() {\n yield 1;\n}")
413 (js2-deftest-parse legacy-generator-cannot-return
414 "function foo() {\n yield 1;\n return 2;\n}" :syntax-error "return 2")
416 (js2-deftest-parse harmony-generator "function* bar() {\n yield 2;\n return 3;\n}")
418 (js2-deftest-parse harmony-generator-yield-star "(function*(a) { yield* a;\n});")
422 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
423 "[a for (a in b) if (a == 2)];")
425 (js2-deftest-parse parse-array-comp-loop-with-filters
426 "[for (a in b) if (a == 2) if (b != 10) a];")
428 (js2-deftest-parse parse-generator-comp-loop-with-filters
429 "(for (x of y) if (x != 4) x);")
431 (js2-deftest-parse parse-array-comp-with-yield-is-ok
432 "(function() { return [for (x of []) yield x];\n});")
434 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
435 "(function() { return (for (x of []) yield x);\n});"
436 :syntax-error "yield")
438 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
439 "(for (x of []) function*() { yield x;\n});")
443 (js2-deftest-parse async-function-statement
444 "async function foo() {\n}")
446 (js2-deftest-parse async-function-statement-inside-block
447 "if (true) {\n async function foo() {\n }\n}")
449 (js2-deftest-parse async-function-expression-statements-are-verboten
450 "async function() {}" :syntax-error "(")
452 (js2-deftest-parse async-named-function-expression
453 "a = async function b() {};")
455 (js2-deftest-parse async-arrow-function-expression
456 "a = async (b) => { b;\n};")
458 (js2-deftest-parse async-method-in-object-literal
461 (js2-deftest-parse async-method-in-class-body
462 "class C {\n async foo() {}\n}")
464 (js2-deftest-parse static-async-method-in-class-body
465 "class C {\n static async foo() {}\n}")
467 (js2-deftest-parse async-method-allow-await
468 "({async f() { await x;\n}});")
472 (js2-deftest-parse await-is-ok "async function foo() {\n await bar();\n}")
474 (js2-deftest-parse await-inside-assignment-is-ok
475 "async function foo() {\n var result = await bar();\n}")
477 (js2-deftest-parse await-inside-array-is-ok
478 "async function foo() {\n var results = [await bar(), await baz()];\n}")
480 (js2-deftest-parse await-inside-non-async-function-is-not-ok
481 "function foo() {\n await bar();\n}"
482 :syntax-error "await")
484 (js2-deftest-parse await-inside-non-async-arrow-function-is-not-ok
485 "a = () => { await bar();\n}"
486 :syntax-error "await")
488 ;;; 'async' and 'await' are contextual keywords
490 (js2-deftest-parse async-can-be-var-name
493 (js2-deftest-parse async-can-be-function-name
494 "function async() {\n}")
496 (js2-deftest-parse await-can-be-var-name
499 (js2-deftest-parse await-can-be-function-name
500 "function await() {\n}")
504 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
506 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
508 (js2-deftest-parse octal-without-o "071;" :reference "57;")
510 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
512 (js2-deftest-parse hex-number-broken "0xz23;"
513 :syntax-error "0xz" :errors-count 2)
515 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
517 (js2-deftest-parse binary-number-broken "0b210;"
518 :syntax-error "0b2" :errors-count 2)
520 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
522 (js2-deftest-parse octal-number-broken "0o812;"
523 :syntax-error "0o8" :errors-count 2)
527 (js2-deftest parse-export-bindings "{one, two as dos}"
529 (should (js2-match-token js2-LC))
530 (let ((imports (js2-parse-export-bindings)))
531 (should (not (equal nil imports)))
532 (should (= 2 (length imports)))
533 (let ((first (nth 0 imports))
534 (second (nth 1 imports)))
535 (should (equal "one" (js2-name-node-name (js2-export-binding-node-extern-name first))))
536 (should (equal "two" (js2-name-node-name (js2-export-binding-node-extern-name second))))
537 (let ((first-name (js2-export-binding-node-local-name first))
538 (second-name (js2-export-binding-node-local-name second)))
539 (should (equal first (js2-node-parent first-name)))
540 (should (equal 3 (js2-node-len first-name)))
541 (should (equal "one" (js2-name-node-name first-name)))
542 (should (equal second (js2-node-parent second-name)))
543 (should (equal 3 (js2-node-len second-name)))
544 (should (equal "dos" (js2-name-node-name second-name)))))))
546 (js2-deftest parse-export-binding-as-default "one as default"
548 (let ((binding (js2-maybe-parse-export-binding)))
550 (should (js2-export-binding-node-p binding))
551 (let ((name (js2-export-binding-node-local-name binding)))
553 (should (equal "default" (js2-name-node-name name))))))
555 (js2-deftest parse-namepsace-import "* as lib;"
557 (should (js2-match-token js2-MUL))
558 (let ((namespace-import (js2-parse-namespace-import)))
559 (should (not (equal nil namespace-import)))
560 (should (js2-namespace-import-node-p namespace-import))
561 (should (= 1 (js2-node-pos namespace-import)))
562 (should (equal 8 (js2-node-len namespace-import)))
563 (let ((name-node (js2-namespace-import-node-name namespace-import)))
564 (should (equal "lib" (js2-name-node-name name-node)))
565 (should (= 5 (js2-node-pos name-node))))))
567 (js2-deftest parse-from-clause "from 'foo/bar';"
569 (let ((from (js2-parse-from-clause)))
570 (should (not (equal nil from)))
571 (should (= 1 (js2-node-pos from)))
572 (should (= 14 (js2-node-len from)))
573 (should (equal "foo/bar" (js2-from-clause-node-module-id from)))))
575 (js2-deftest parse-import-module-id-only "import 'src/lib'"
577 (should (js2-match-token js2-IMPORT))
578 (let ((import (js2-parse-import)))
579 (should (not (equal nil import)))
580 (should (= 1 (js2-node-pos import)))
581 (should (= 16 (js2-node-len import)))
582 (should (equal nil (js2-import-node-import import)))
583 (should (equal nil (js2-import-node-from import)))))
585 (js2-deftest parse-imported-default-binding "import theDefault from 'src/lib'"
586 (js2-push-scope (make-js2-scope :pos 0))
588 (should (js2-match-token js2-IMPORT))
589 (let ((import-node (js2-parse-import)))
590 (should (not (equal nil import-node)))
591 (should (equal "src/lib" (js2-import-node-module-id import-node)))
592 (let ((import (js2-import-node-import import-node)))
593 (should (not (equal nil import)))
594 (should (equal nil (js2-import-clause-node-namespace-import import)))
595 (should (equal nil (js2-import-clause-node-named-imports import)))
596 (let ((default (js2-import-clause-node-default-binding import)))
597 (should (not (equal nil default)))
598 (should (js2-export-binding-node-p default))
599 (should (equal "theDefault" (js2-name-node-name (js2-export-binding-node-extern-name default)))))))
600 (should (js2-scope-get-symbol js2-current-scope "theDefault")))
602 (js2-deftest parse-import-namespace-binding "import * as lib from 'src/lib'"
603 (js2-push-scope (make-js2-scope :pos 0))
605 (should (js2-match-token js2-IMPORT))
606 (let ((import-node (js2-parse-import)))
607 (should (not (equal nil import-node)))
608 (should (equal "src/lib" (js2-import-node-module-id import-node)))
609 (let ((import (js2-import-node-import import-node)))
610 (should (not (equal nil import)))
611 (should (equal nil (js2-import-clause-node-default-binding import)))
612 (should (equal nil (js2-import-clause-node-named-imports import)))
613 (let ((ns-import (js2-import-clause-node-namespace-import import)))
614 (should (not (equal nil ns-import)))
615 (should (js2-namespace-import-node-p ns-import))
616 (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
617 (should (js2-scope-get-symbol js2-current-scope "lib")))
619 (js2-deftest parse-import-named-imports "import {foo as bar, baz} from 'src/lib'"
620 (js2-push-scope (make-js2-scope :pos 0))
622 (should (js2-match-token js2-IMPORT))
623 (let ((import-node (js2-parse-import)))
624 (should (not (equal nil import-node)))
625 (should (equal "src/lib" (js2-import-node-module-id import-node)))
626 (let ((import (js2-import-node-import import-node)))
627 (should (not (equal nil import)))
628 (should (equal nil (js2-import-clause-node-default-binding import)))
629 (should (equal nil (js2-import-clause-node-namespace-import import)))
630 (let ((named-imports (js2-import-clause-node-named-imports import)))
631 (should (not (equal nil named-imports)))
632 (should (listp named-imports))
633 (should (= 2 (length named-imports)))
634 (let ((first (nth 0 named-imports))
635 (second (nth 1 named-imports)))
636 (should (equal "bar" (js2-name-node-name (js2-export-binding-node-local-name first))))
637 (should (equal "baz" (js2-name-node-name (js2-export-binding-node-local-name second))))))))
638 (should (js2-scope-get-symbol js2-current-scope "bar"))
639 (should (js2-scope-get-symbol js2-current-scope "baz")))
641 (js2-deftest parse-import-default-and-namespace "import stuff, * as lib from 'src/lib'"
642 (js2-push-scope (make-js2-scope :pos 0))
644 (should (js2-match-token js2-IMPORT))
645 (let ((import-node (js2-parse-import)))
646 (should (not (equal nil import-node)))
647 (should (equal "src/lib" (js2-import-node-module-id import-node)))
648 (let ((import (js2-import-node-import import-node)))
649 (should (not (equal nil import)))
650 (should (equal nil (js2-import-clause-node-named-imports import)))
651 (let ((default (js2-import-clause-node-default-binding import))
652 (ns-import (js2-import-clause-node-namespace-import import)))
653 (should (not (equal nil default)))
654 (should (equal "stuff" (js2-name-node-name (js2-export-binding-node-local-name default))))
655 (should (not (equal nil ns-import)))
656 (should (js2-namespace-import-node-p ns-import))
657 (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
658 (should (js2-scope-get-symbol js2-current-scope "stuff"))
659 (should (js2-scope-get-symbol js2-current-scope "lib")))
661 (js2-deftest parse-import-default-and-named-imports
662 "import robert as bob, {cookies, pi as PIE} from 'src/lib'"
663 (js2-push-scope (make-js2-scope :pos 0))
665 (should (js2-match-token js2-IMPORT))
666 (let ((import-node (js2-parse-import)))
667 (should (not (equal nil import-node)))
668 (should (equal "src/lib" (js2-import-node-module-id import-node)))
669 (let ((import (js2-import-node-import import-node)))
670 (should (not (equal nil import)))
671 (should (not (equal nil (js2-import-clause-node-named-imports import))))
672 (let ((default (js2-import-clause-node-default-binding import))
673 (named-imports (js2-import-clause-node-named-imports import)))
674 (should (not (equal nil default)))
675 (should (equal "bob" (js2-name-node-name (js2-export-binding-node-local-name default))))
676 (should (not (equal nil named-imports)))
677 (should (= 2 (length named-imports))))))
678 (should (js2-scope-get-symbol js2-current-scope "bob"))
679 (should (js2-scope-get-symbol js2-current-scope "cookies"))
680 (should (js2-scope-get-symbol js2-current-scope "PIE")))
682 (js2-deftest parse-this-module-in-from-clause "import {url} from this module;"
683 (js2-push-scope (make-js2-scope :pos 0))
685 (should (js2-match-token js2-IMPORT))
686 (let ((import-node (js2-parse-import)))
688 (let ((from-clause (js2-import-node-from import-node)))
690 (should (equal "this" (js2-from-clause-node-module-id from-clause)))
691 (should (js2-from-clause-node-metadata-p from-clause)))))
693 (js2-deftest-parse import-only-for-side-effects "import 'src/lib';")
694 (js2-deftest-parse import-default-only "import theDefault from 'src/lib';")
695 (js2-deftest-parse import-named-only "import {one, two} from 'src/lib';")
696 (js2-deftest-parse import-default-and-named "import theDefault, {one, two} from 'src/lib';")
697 (js2-deftest-parse import-renaming-default "import * as lib from 'src/mylib';")
698 (js2-deftest-parse import-renaming-named "import {one as uno, two as dos} from 'src/lib';")
699 (js2-deftest-parse import-default-and-namespace "import robert as bob, * as lib from 'src/lib';")
700 (js2-deftest-parse import-from-this-module "import {url} from this module;")
704 (js2-deftest export-rexport "export * from 'other/lib'"
706 (should (js2-match-token js2-EXPORT))
707 (let ((export-node (js2-parse-export)))
709 (should (js2-export-node-from-clause export-node))))
711 (js2-deftest export-export-named-list "export {foo, bar as bang};"
713 (should (js2-match-token js2-EXPORT))
714 (let ((export-node (js2-parse-export)))
716 (let ((exports (js2-export-node-exports-list export-node)))
718 (should (= 2 (length exports))))))
720 (js2-deftest re-export-named-list "export {foo, bar as bang} from 'other/lib'"
722 (should (js2-match-token js2-EXPORT))
723 (let ((export-node (js2-parse-export)))
725 (should (js2-export-node-from-clause export-node))
726 (let ((exports (js2-export-node-exports-list export-node)))
728 (should (= 2 (length exports))))))
730 (js2-deftest export-variable-statement "export var foo = 'bar', baz = 'bang';"
732 (js2-push-scope (make-js2-scope :pos 0))
733 (should (js2-match-token js2-EXPORT))
734 (let ((export-node (js2-parse-export)))
736 (should (js2-export-node-declaration export-node))))
738 (js2-deftest export-const-declaration "export const PI = Math.PI;"
740 (js2-push-scope (make-js2-scope :pos 0))
741 (should (js2-match-token js2-EXPORT))
742 (let ((export-node (js2-parse-export)))
744 (should (js2-export-node-declaration export-node))))
746 (js2-deftest export-let-declaration "export let foo = [1];"
748 (js2-push-scope (make-js2-scope :pos 0))
749 (should (js2-match-token js2-EXPORT))
750 (let ((export-node (js2-parse-export)))
752 (should (js2-var-decl-node-p (js2-export-node-declaration export-node)))))
754 (js2-deftest export-class-declaration "export class Foo {}"
756 (js2-push-scope (make-js2-scope :pos 0))
757 (should (js2-match-token js2-EXPORT))
758 (let ((export-node (js2-parse-export)))
760 (should (js2-class-node-p (js2-export-node-declaration export-node)))))
762 (js2-deftest export-function-declaration "export default function doStuff() {}"
764 (js2-push-scope (make-js2-scope :pos 0))
765 (should (js2-match-token js2-EXPORT))
766 (let ((export-node (js2-parse-export)))
768 (should (js2-export-node-default export-node))))
770 (js2-deftest export-generator-declaration "export default function* one() {}"
772 (js2-push-scope (make-js2-scope :pos 0))
773 (should (js2-match-token js2-EXPORT))
774 (let ((export-node (js2-parse-export)))
776 (should (js2-export-node-default export-node))))
778 (js2-deftest export-assignment-expression "export default a = b;"
780 (js2-push-scope (make-js2-scope :pos 0))
781 (should (js2-match-token js2-EXPORT))
782 (let ((export-node (js2-parse-export)))
784 (should (js2-export-node-default export-node))))
786 (js2-deftest export-function-no-semicolon "export default function foo() {}"
788 (should (equal nil js2-parsed-warnings)))
789 (js2-deftest export-default-function-no-semicolon "export function foo() {}"
791 (should (equal nil js2-parsed-warnings)))
792 (js2-deftest export-anything-else-does-require-a-semicolon "export var obj = {}"
794 (should (not (equal nil js2-parsed-warnings))))
796 (js2-deftest export-default-async-function-no-semicolon "export default async function foo() {}"
798 (should (equal nil js2-parsed-warnings)))
799 (js2-deftest export-async-function-no-semicolon "export async function foo() {}"
801 (should (equal nil js2-parsed-warnings)))
803 (js2-deftest-parse parse-export-rexport "export * from 'other/lib';")
804 (js2-deftest-parse parse-export-export-named-list "export {foo, bar as bang};")
805 (js2-deftest-parse parse-re-export-named-list "export {foo, bar as bang} from 'other/lib';")
806 (js2-deftest-parse parse-export-const-declaration "export const PI = Math.PI;")
807 (js2-deftest-parse parse-export-let-declaration "export let foo = [1];")
808 (js2-deftest-parse parse-export-function-declaration "export default function doStuff() {\n}")
809 (js2-deftest-parse parse-export-generator-declaration "export default function* one() {\n}")
810 (js2-deftest-parse parse-export-assignment-expression "export default a = b;")
812 (js2-deftest-parse parse-export-function-declaration-no-semi
813 "export function f() {\n}")
815 (js2-deftest-parse parse-export-class-declaration-no-semi
816 "export class C {\n}")
818 (js2-deftest-parse parse-export-async-function-allow-await
819 "export async function f() {\n await f();\n}")
821 (js2-deftest-parse parse-export-default-async-function-allow-await
822 "export default async function f() {\n await f();\n}")
826 (js2-deftest-parse string-literal
829 (js2-deftest-parse object-get-string-literal
830 "var x = {y: 5};\nvar z = x[\"y\"];")
832 (js2-deftest-parse template-no-substritutions
834 def`, y = `\\u0000`;")
836 (js2-deftest-parse template-with-substitutions
837 "var y = `${a + b} ${d + e + f}`;")
839 (js2-deftest-parse tagged-template
840 "foo.args`${++x, \"o\"}k`;")
844 (js2-deftest-parse parse-harmony-class-statement
845 "class Foo {\n get bar() { return 42;\n}\n set bar(x) { y = x;\n}\n}")
847 (js2-deftest-parse parse-harmony-class-statement-without-name-is-not-ok
848 "class {\n get bar() { return 42;\n}\n}"
851 (js2-deftest-parse parse-harmony-class-expression
852 "var Foo1 = class Foo {\n bar() { return 42;\n}\n};")
854 (js2-deftest-parse parse-harmony-anonymous-class-expression
855 "var Foo = class {\n set bar(x) { bar = x;\n}\n};")
857 (js2-deftest-parse parse-harmony-class-with-extends
858 "class Foo extends Bar {\n}")
860 (js2-deftest-parse parse-harmony-anonymous-class-with-extends
861 "foo.Foo = class extends Bar {\n set bar(x) { bar = x;\n}\n};")
863 (js2-deftest-parse parse-harmony-class-with-complex-extends
864 "class Foo extends foo[BAR][2].Baz {\n}")
866 (js2-deftest-parse parse-harmony-class-missing-extended-class-is-not-ok
867 "class Foo extends {\n}"
868 :syntax-error "extends")
870 (js2-deftest-parse parse-harmony-class-static-method
871 "class Foo extends Bar {\n static bar() { return 42;\n}\n}")
873 (js2-deftest-parse parse-unterminated-class-is-not-okay
874 "class Foo {\n get bar() { return 42;\n}"
877 (js2-deftest-parse parse-super-keyword
878 "class Foo {\n constructor() { super(42);\n}\n foo() { super.foo();\n}\n}")
880 (js2-deftest-parse parse-class-keywordlike-method
881 "class C {\n delete() {}\n if() {}\n}")
883 (js2-deftest-parse parse-harmony-class-allow-semicolon-element
884 "class Foo {;}" :reference "class Foo {\n}")
888 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
890 (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
891 (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
892 (should (equal (js2-symbol-name entry) "foo"))
893 (should (js2-function-node-p (js2-symbol-ast-node entry)))))
895 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
900 (let* ((scope (js2-node-at-point (point-min)))
901 (fn-entry (js2-scope-get-symbol scope 'bar))
902 (var-entry (js2-scope-get-symbol scope 'x)))
903 (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
904 (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
905 (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
906 (should (= (js2-symbol-decl-type var-entry) js2-VAR))
907 (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
909 (defun js2-test-scope-of-nth-variable-satisifies-predicate (variable nth predicate)
910 (goto-char (point-min))
911 (dotimes (n (1+ nth)) (search-forward variable))
913 (let ((scope (js2-node-get-enclosing-scope (js2-node-at-point))))
914 (should (funcall predicate (js2-get-defining-scope scope variable)))))
916 (js2-deftest for-node-is-declaration-scope "for (let i = 0; i; ++i) {};"
918 (js2-test-scope-of-nth-variable-satisifies-predicate "i" 0 #'js2-for-node-p))
920 (js2-deftest const-scope-sloppy-script "{const a;} a;"
922 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-script-node-p)
923 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'js2-script-node-p))
925 (js2-deftest const-scope-strict-script "'use strict'; { const a; } a;"
927 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
928 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
930 (js2-deftest const-scope-sloppy-function "function f() { { const a; } a; }"
932 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-function-node-p)
933 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'js2-function-node-p))
935 (js2-deftest const-scope-strict-function "function f() { 'use strict'; { const a; } a; }"
937 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
938 (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
940 (js2-deftest array-comp-is-result-scope "[x * 2 for (x in y)];"
942 (js2-test-scope-of-nth-variable-satisifies-predicate "x" 0 #'js2-comp-loop-node-p))
944 (js2-deftest array-comp-has-parent-scope
945 "var a,b=[for (i of [[1,2]]) for (j of i) j * a];"
947 (search-forward "for")
949 (let ((node (js2-node-at-point)))
950 (should (js2-scope-parent-scope node))
951 (should (js2-get-defining-scope node "j"))))
955 (js2-deftest get-token "(1+1)"
957 (should (eq js2-LP (js2-next-token)))
958 (should (eq js2-NUMBER (js2-next-token)))
959 (should (eq js2-ADD (js2-next-token)))
960 (should (eq js2-NUMBER (js2-next-token)))
961 (should (eq js2-RP (js2-next-token))))
963 (js2-deftest unget-token "()"
965 (should (eq js2-LP (js2-next-token)))
967 (should (eq js2-LP (js2-next-token)))
968 (should (eq js2-RP (js2-next-token))))
970 (js2-deftest get-token-or-eol "x\n++;"
972 (should (eq js2-NAME (js2-next-token)))
973 (should (eq js2-EOL (js2-peek-token-or-eol)))
974 (should (eq js2-INC (js2-next-token)))
975 (should (eq js2-SEMI (js2-peek-token-or-eol))))
977 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
979 (should (eq js2-NAME (js2-next-token)))
980 (should (eq js2-NAME (js2-next-token)))
981 (should (equal "y" (js2-current-token-string)))
983 (should (eq js2-NAME (js2-current-token-type)))
984 (should (equal "x" (js2-current-token-string))))
986 (js2-deftest ts-seek "(1+2)"
988 (should (eq js2-LP (js2-next-token)))
989 (should (eq js2-NUMBER (js2-next-token)))
991 (let ((state (make-js2-ts-state)))
992 (should (eq js2-NUMBER (js2-next-token)))
993 (should (eq js2-ADD (js2-next-token)))
995 (should (eq 1 js2-ti-lookahead))
996 (should (eq js2-NUMBER (js2-next-token)))
997 (should (eq 1 (js2-token-number
998 (js2-current-token))))))
1000 (js2-deftest get-token-template-literal "`abc ${i} z ${j} def`"
1002 (should (eq js2-TEMPLATE_HEAD (js2-next-token)))
1003 (should (equal "abc " (js2-current-token-string)))
1004 (should (eq js2-NAME (js2-next-token)))
1005 (should (eq js2-RC (js2-next-token)))
1006 (should (eq js2-TEMPLATE_HEAD (js2-next-token 'TEMPLATE_TAIL)))
1007 (should (equal " z " (js2-current-token-string)))
1008 (should (eq js2-NAME (js2-next-token)))
1009 (should (eq js2-RC (js2-next-token)))
1010 (should (eq js2-NO_SUBS_TEMPLATE (js2-next-token 'TEMPLATE_TAIL)))
1011 (should (equal " def" (js2-current-token-string))))
1015 (js2-deftest for-node-with-error-len "for "
1017 (let ((node (js2-node-at-point (point-min))))
1018 (should (= (js2-node-len (js2-node-parent node)) 4))))
1020 (js2-deftest function-without-parens-error "function b {}"
1021 ;; Should finish the parse.
1026 (js2-deftest comment-node-length "//"
1028 (let ((node (js2-node-at-point (point-min))))
1029 (should (= (js2-node-len node) 2))))
1031 (js2-deftest comment-node-length-newline "//\n"
1033 (let ((node (js2-node-at-point (point-min))))
1034 (should (= (js2-node-len node) 3))))
1036 ;;; Variables classification
1038 (defun js2--variables-summary (vars)
1040 (setq vars (let (aslist)
1041 (maphash (lambda (k v) (push (cons k v) aslist)) vars)
1043 (dolist (v (sort vars (lambda (a b) (< (js2-node-abs-pos (js2-symbol-ast-node (car a)))
1044 (js2-node-abs-pos (js2-symbol-ast-node (car b)))))))
1045 (let* ((symbol (car v))
1048 (symn (js2-symbol-ast-node symbol))
1049 (namen (js2--get-name-node symn)))
1050 (push (format "%s@%s:%s"
1051 (js2-symbol-name symbol)
1052 (js2-node-abs-pos namen)
1056 (if inition "I" "N")
1058 (dolist (u (sort (cddr v) (lambda (a b) (< (js2-node-abs-pos a)
1059 (js2-node-abs-pos b)))))
1060 (push (js2-node-abs-pos u) r))))
1063 (defmacro js2-deftest-classify-variables (name buffer-contents summary)
1064 (declare (indent defun))
1065 `(ert-deftest ,(intern (format "js2-classify-variables-%s" name)) ()
1068 (insert ,buffer-contents))
1072 (should (equal ,summary (js2--variables-summary
1073 (js2--classify-variables)))))
1074 (fundamental-mode)))))
1076 (js2-deftest-classify-variables incomplete-var-statement
1080 (js2-deftest-classify-variables unused-variable
1081 "function foo () { var x; return 42; }"
1082 '("foo@10:U" "x@23:U"))
1084 (js2-deftest-classify-variables unused-variable-declared-twice
1085 "function foo (a) { var x; function bar () { var x; x=42; }; return a;}"
1086 '("foo@10:U" "a@15:P" 68 "x@24:U" "bar@36:U" "x@49:U"))
1088 (js2-deftest-classify-variables assigned-variable
1089 "function foo () { var x; x=42; return x; }"
1090 '("foo@10:U" "x@23:I" 39))
1092 (js2-deftest-classify-variables assignment-in-nested-function
1093 "function foo () { var x; function bar () { x=42; }; }"
1094 '("foo@10:U" "x@23:U" "bar@35:U"))
1096 (js2-deftest-classify-variables unused-nested-function
1097 "function foo() { var i, j=1; function bar() { var x, y=42, z=i; return y; } return i; }"
1098 '("foo@10:U" "i@22:N" 62 84 "j@25:U" "bar@39:U" "x@51:U" "y@54:I" 72 "z@60:U"))
1100 (js2-deftest-classify-variables prop-get-initialized
1101 "function foo () { var x, y={}; y.a=x; }"
1102 '("foo@10:U" "x@23:N" 36 "y@26:I" 32))
1104 (js2-deftest-classify-variables prop-get-uninitialized
1105 "function foo () { var x; if(x.foo) alert('boom'); }"
1106 '("foo@10:U" "x@23:N" 29))
1108 (js2-deftest-classify-variables prop-get-function-assignment
1109 "(function(w) { w.f = function() { var a=42, m; return a; }; })(window);"
1110 '("w@11:P" 11 16 "a@39:I" 55 "m@45:U"))
1112 (js2-deftest-classify-variables let-declaration
1113 "function foo () { let x,y=1; return x; }"
1114 '("foo@10:U" "x@23:N" 37 "y@25:U"))
1116 (js2-deftest-classify-variables external-function-call
1117 "function foo (m) { console.log(m, arguments); }"
1118 '("foo@10:U" "m@15:P" 32))
1120 (js2-deftest-classify-variables global-function-call
1121 "function bar () { return 42; } function foo (a) { return bar(); }"
1122 '("bar@10:I" 58 "foo@41:U" "a@46:P"))
1124 (js2-deftest-classify-variables let-declaration-for-scope
1125 "function foo () { for(let x=1,y; x<y; y++) {} }"
1126 '("foo@10:U" "x@27:I" 34 "y@31:N" 36 39))
1128 (js2-deftest-classify-variables arguments-implicit-var
1129 "function foo () { var p; for(p in arguments) { return p; } }"
1130 '("foo@10:U" "p@23:I" 55))
1132 (js2-deftest-classify-variables catch-error-variable
1133 "function foo () { try { throw 'Foo'; } catch (e) { console.log(e); }"
1134 '("foo@10:U" "e@47:I" 64))
1136 (js2-deftest-classify-variables prop-get-assignment
1137 "function foo () { var x={y:{z:{}}}; x.y.z=42; }"
1138 '("foo@10:U" "x@23:I" 37))
1140 (js2-deftest-classify-variables unused-function-argument
1141 "function foo (a) { return 42; }"
1142 '("foo@10:U" "a@15:P"))
1144 (js2-deftest-classify-variables used-function-argument
1145 "function foo (a) { a=42; return a; }"
1146 '("foo@10:U" "a@15:P" 33))
1148 (js2-deftest-classify-variables prop-get
1149 "function foo (a) { a=navigator.x||navigator.y; return a; }"
1150 '("foo@10:U" "a@15:P" 55))
1152 (js2-deftest-classify-variables for-in-loop
1153 "function foo () { var d={}; for(var k in d) {var v=d[k]; } }"
1154 '("foo@10:U" "d@23:I" 42 52 "k@37:I" 54 "v@50:U"))
1156 (js2-deftest-classify-variables array-comprehension-legacy
1157 "function foo() { var j,a=[for (i of [1,2,3]) i*j]; }"
1158 '("foo@10:U" "j@22:N" 48 "a@24:U" "i@32:I" 46))
1160 (js2-deftest-classify-variables array-comprehension
1161 "function foo() { var j,a=[[i,j] for (i of [1,2,3])]; }"
1162 '("foo@10:U" "j@22:N" 30 "a@24:U" "i@38:I" 28))
1164 (js2-deftest-classify-variables return-named-function
1165 "function foo() { var a=42; return function bar() { return a; } }"
1166 '("foo@10:U" "a@22:I" 59 "bar@44:I" 44))
1168 (js2-deftest-classify-variables named-wrapper-function
1169 "function foo() { var a; (function bar() { a=42; })(); return a; }"
1170 '("foo@10:U" "a@22:I" 62 "bar@35:I" 35))